benchmark bcrypt

Code:

============================================================
package main

import (
	"log"
	"sync"

	"github.com/pkg/profile"
	"golang.org/x/crypto/bcrypt"
)

func main() {
	p := profile.Start(profile.MemProfile, profile.ProfilePath("."), profile.NoShutdownHook)
	defer p.Stop()

	var wg sync.WaitGroup
	for i := 0; i <= 500; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			err := bcrypt.CompareHashAndPassword([]byte("$2a$10$Q1bGQ4ERi4Zj.slbReOjOu0/T.2MhLCX9ASvCQqfh1LgbdRLdO6o6"), []byte("12345678"))
			if err != nil {
				log.Printf("error on compare: %v", err)
			}
		}()
	}

	wg.Wait()
	log.Printf("DONE")
}

============================================================

Results:


$ go tool pprof /Users/henriquechehad/go/src/github.com/henriquechehad/benchmark-bcrypt/benchmark-bcrypt /Users/henriquechehad/go/src/github.com/henriquechehad/benchmark-bcrypt/mem.pprof
File: benchmark-bcrypt
Type: inuse_space
Time: Jul 5, 2018 at 11:42am (BRT)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof)
(pprof) top
Showing nodes accounting for 3740.70kB, 99.41% of 3763.08kB total
Dropped 3 nodes (cum <= 18.81kB)
Showing top 10 nodes out of 13
      flat  flat%   sum%        cum   cum%
 3424.02kB 90.99% 90.99%  3424.02kB 90.99%  vendor/golang.org/x/crypto/blowfish.NewSaltedCipher /Users/henriquechehad/go/src/vendor/golang.org/x/crypto/blowfish/cipher.go
   88.59kB  2.35% 93.34%    92.60kB  2.46%  vendor/golang.org/x/crypto/bcrypt.(*hashed).Hash /Users/henriquechehad/go/src/vendor/golang.org/x/crypto/bcrypt/bcrypt.go
   67.05kB  1.78% 95.13%    67.05kB  1.78%  runtime.malg /usr/local/go/src/runtime/proc.go
   64.42kB  1.71% 96.84%    64.42kB  1.71%  vendor/golang.org/x/crypto/bcrypt.newFromHash /Users/henriquechehad/go/src/vendor/golang.org/x/crypto/bcrypt/bcrypt.go
   36.28kB  0.96% 97.80%  3661.49kB 97.30%  main.main.func1 /Users/henriquechehad/go/src/github.com/henriquechehad/benchmark-bcrypt/main.go
   28.22kB  0.75% 98.55%   101.59kB  2.70%  runtime.systemstack /usr/local/go/src/runtime/asm_amd64.s
   28.11kB  0.75% 99.30%    28.11kB  0.75%  vendor/golang.org/x/crypto/bcrypt.base64Encode /Users/henriquechehad/go/src/vendor/golang.org/x/crypto/bcrypt/base64.go
    4.02kB  0.11% 99.41%  3468.19kB 92.16%  vendor/golang.org/x/crypto/bcrypt.bcrypt /Users/henriquechehad/go/src/vendor/golang.org/x/crypto/bcrypt/bcrypt.go
         0     0% 99.41%   101.59kB  2.70%  runtime.mstart /usr/local/go/src/runtime/proc.go
         0     0% 99.41%    73.37kB  1.95%  runtime.newproc.func1 /usr/local/go/src/runtime/proc.go
(pprof)